Drilldown: Patents

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Patents > Filing date: 1913 & Number of figures: 16-50

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airplane (12) · Stability (11) · propellers (6) · propulsion (5) · Frame (5) · Wings (4) · military (4) · automatic stability (4) · lift (3) · Flapping (3) · navigation (3) · projectile (3) · design (3) · sustentation (3) · ascension (3) · LTA (2) · safety (2) · compartments (2) · ballonet (2) · None (2)
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